Side by side

Borealis Watch Co. Estoril 300 GMTvsMarathon TSAR (Tritium Search & Rescue) Diver's Quartz

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Estoril 300 GMT
Borealis Watch Co.Estoril 300 GMT
MSRP $600
TSAR (Tritium Search & Rescue) Diver's Quartz
MarathonTSAR (Tritium Search & Rescue) Diver's Quartz
MSRP $1,550

At a glance

9 of 29 specs differ
Diameter
Estoril 300 GMT41.50mm
TSAR (Tritium Search & Rescue) Diver's Quartz46mm
Power Reserve
Estoril 300 GMT40h
TSAR (Tritium Search & Rescue) Diver's Quartz40h
Water Resistance
Estoril 300 GMT300m
TSAR (Tritium Search & Rescue) Diver's Quartz300m
MSRP
Estoril 300 GMT$600
TSAR (Tritium Search & Rescue) Diver's Quartz$1,550

Full specifications

Case

5 specs
Diameter
41.50mm
46mm
Thickness
13.5mm
14mm
Lug-to-Lug
47mm
48mm
Lug Width
20mm
20mm
Material
Stainless Steel
316L Stainless Steel

Crystal & Dial

1 specs
Lume
BGW9
None

Movement

2 specs
Caliber
Miyota 9075
Swiss High-Torque Quartz
Type
Automatic
Quartz

Pricing

1 specs
MSRP
$600
$1,550

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Borealis Watch Co. Estoril 300 GMT

Owners widely praise the Borealis Watch Co. Estoril 300 GMT for its excellent value, robust build quality, and crisp dial, with reviewers highlighting its exceptionally bright BGW9 lume and dive-ready ceramic bezel. Some owners appreciate the brushed and polished finishes, though one owner noted a desire for a white-painted second hand. The included NATO strap is considered too thick with a loose weave, and the sapphire bezel insert is seen by some as a minor aesthetic departure from its inspirations. Overall, owners rate the Borealis Watch Co. Estoril 300 GMT highly for its impressive build quality and value.

Marathon TSAR (Tritium Search & Rescue) Diver's Quartz

Owners widely praise the Marathon TSAR (Tritium Search & Rescue) Diver's Quartz for its ISO 6425 certification and practical, everyday wearability, with one owner noting the movement sets and ticks fine with expected quartz accuracy. The bezel and crystal are also described as great. One owner reports the 41mm TSAR wears small and has a field watch aesthetic, while another notes the TSAR Medium, listed at 12mm thick, visually appears thicker. Overall, owners rate the Marathon TSAR (Tritium Search & Rescue) Diver's Quartz highly for its robust build and practical design.

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